1. Image preview onerror fires on clearPreview (#68)
clearPreview() set previewImg.src='' which triggered the stale onerror
handler, showing 'Could not load image' on every refresh/message.
Fix: null out onerror before clearing src.
2. CLI session badge covers delete button (#69)
The ::after 'cli' label occupied the same space as the hover-revealed
.session-actions overlay, making delete unreachable.
Fix: add padding-right to .cli-session, use margin-left:auto to push
badge right, add pointer-events:none so clicks pass through.
3. Tool cards visible through profile dropdown
The .messages container had no stacking context, so tool cards could
render above the profile dropdown (z-index:200).
Fix: add position:relative;z-index:0 to .messages to establish a
stacking context that keeps all children below overlays.
Closes#68, closes#69
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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